Plombières is a municipality of Wallonia located in the province of Liège, Belgium.
On January 1, 2006, Plombières had a total population of 9,672. The total area is 53.17 km² which gives a population density of 182 inhabitants per km².
The municipality consists of the following districts: Gemmenich, Hombourg, Montzen, Moresnet, and Sippenaeken.
The local language is Low Dietsch, a bridge dialect between East Limburgish and Ripuarian.